By all accounts, Spider-Man: Homecoming is an extremely lighthearted movie (and it certainly seemed that way in the footage shown at SDCC), so this aesthetic likely has nothing to do with the aesthetic of the movie. But Tom Holland is right, it does make him seem like a bad-ass, and previews his physically adroit, acrobatic Spider-Man. It's not as funny as this video making fun of Chris Hemsworth, but it'll do.